A random sample of Americans taken in December 2021 finds that 64 out of 100 subjects have taken the Covid Vaccine. A similar study in the UK finds that 84 out of 100 subjects have taken the Covid Vaccine. Determine whether there is a significant difference in proportions between the vaccination rates of the two countries.

B) Calculate a 95% confidence interval for the difference in vaccination rates between countries. Make a statement about the confidence interval based on whether or not it contains 0.